According to Vulture, the Monster and Aeon Flux actress will portray Helen Gandy, who served as Hoover's personal secretary for over 54 years. She reportedly destroyed his "Personal File" (i.e., dirt on VIPs) following his death in 1972.

This news comes on the heels of the casting of The Social Network's Armie Hammer as Clyde Tolson, Hoover's right-hand man and alleged lover.